GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Drain the engine coolant. Refer to Engine Cover Replacement
  2. Remove the engine cover. Refer to Engine Cover Replacement

  3. Object Number: 2016492  Size: SH
  4. Remove the air cleaner cap with hose.
  5. Disconnect the mass air flow meter connector (1).
  6. Separate the 2 wire harness clamps (2, 3).

  7. Object Number: 2016494  Size: SH
  8. Disconnect the vacuum switching valve connector (2) and the 2 vacuum hoses (1, 3).

  9. Object Number: 2016495  Size: SH
  10. Disconnect the ventilation hose (1).

  11. Object Number: 2016496  Size: SH
  12. Loosen the air cleaner hose clamp (1), and unlock the 3 air cleaner assembly clamps (2, 3, 4) and remove the air cleaner cap sub-assembly with hose.

  13. Object Number: 2016498  Size: SH
  14. Remove the throttle body assembly.
  15. Disconnect the 2 water by-pass hoses (1, 2).

  16. Object Number: 2016499  Size: SH
  17. Disconnect the throttle body assembly connector (1).

  18. Object Number: 2016501  Size: SH
  19. Disconnect the throttle body hose (1).

  20. Object Number: 2016502  Size: SH
  21. Remove the 4 bolts (1, 2, 3, 4) and the throttle body assembly.

  22. Object Number: 2016503  Size: SH
  23. Remove the gasket (1) from the intake manifold.

Installation Procedure


    Object Number: 2016503  Size: SH
  1. Install a new gasket (1) onto the intake manifold.
  2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 2016502  Size: SH
  3. Install the throttle body assembly with the 4 bolts (1, 2, 3, 4) and tighten to 30 N·m (22 lb ft)

  4. Object Number: 2016501  Size: SH
  5. Connect the throttle body hose (1).

  6. Object Number: 2016499  Size: SH
  7. Connect the throttle body connector (1).

  8. Object Number: 2016498  Size: SH
  9. Connect the 2 water by-pass hoses (1, 2).

  10. Object Number: 2016496  Size: SH
  11. Install the air cleaner cap with hose.
  12. Install the air cleaner cap sub-assembly with hose and lock the 3 clamps (2, 3, 4).
  13. Tighten the air cleaner hose clamp (1).

  14. Object Number: 2016495  Size: SH
  15. Connect the ventilation hose (1).

  16. Object Number: 2016494  Size: SH
  17. Connect the 2 vacuum hoses (1, 3) and the vacuum switching valve connector (2).

  18. Object Number: 2016492  Size: SH
  19. Connect the 2 wire harness clamps (2, 3) and the mass air flow meter connector (1).
  20. Add engine coolant. Refer to Engine Cover Replacement
  21. Inspect for coolant leak.
  22. Install the engine cover. Refer to Engine Cover Replacement